Dynamics and control of a heat pump assisted azeotropic dividing-wall column (HP-A-DWC) for biobutanol purification

Iulian Patraşcu, Costin Sorin Bîldea, Anton A. Kiss

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Recently, the butanol purification from acetone-butanol-ethanol mixture was achieved in one azeotropic dividing-wall column requiring 2.7 MJ/kg butanol, which represents just 7.5% of the energy content of butanol. Compared to a conventional separation sequence, this design allows 60% energy savings due to heat integration and use of a heat pump. This work considers the dynamics and control of the process. The basic regulatory control can provide stability for small and short-time disturbances, but the process shuts down if the disturbances persist. By adding a reboiler and a condenser, better control becomes possible. As a result, the process can handle large and persistent disturbances in feed rate and composition, achieving good control of product purity.

Original languageEnglish
Title of host publicationComputer Aided Chemical Engineering
PublisherElsevier B.V.
Pages1339-1344
Number of pages6
DOIs
Publication statusPublished - 2019

Publication series

NameComputer Aided Chemical Engineering
Volume46
ISSN (Print)1570-7946

Keywords

  • Dividing-wall column
  • heat integration
  • optimal design
  • process control

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Computer Science Applications

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